TM 5-3805-258-24-1F U E L S Y S T E MT E S T I N G A N D A D J U S T I N Gtemperature at an exhaust manifold port is an indica-tion of no fuel to the cylinder. This can possibly be anindication of a nozzle with a defect. Extra high tem-perature at an exhaust manifold port can be an indi-cation of too much fuel to the cylinder, also caused bya nozzle with a defect.The most common defects found with the fuelinjection nozzles are:1. Carbon on tip of the nozzle or in the nozzleorifice.2. Orifice wear.CAUTIONE X T R A V A L VEL. Gauge protector valve (must be in open position at allt i m e s ) .Do not test nozzles unless you have the correctservice tools.CAUTIONTESTING 8N7001 FUELINJECTION NOZZLESTools Needed:*5P4150 Nozzle Testing Group.5P7448Adapter.8S2270 Fuel Collector.FT1384 Extension,8S2245 Cleaning Tool Group,8S2258 BraaaWire Brush.8S2252 Carbon Seal Installation Tool.lF1 153NeedleNosePliera.5V2170 Tube Aaaembly.7/84”HexWrench.*Special Instruction Form No. SEHS7292.5P4150 NOZZLE TESTING GROUP1. 8N70M Nozzle Aaaembly. A. 5P7445Adapter. B. 5P4146Gauge, O to 6600kPa (O to 1000psi).C. 6V2170 Tube Aa-aembly. D. 2P2324Gauge, Oto34500 kPa(O to 5000 pai).E.Gauge protector valvefor 2P2324Gauge. F. FT1364 Exten-eion. G. Gauge protector valve for 5P4146Geuge. H. On-off valve. J. 6S2270 Fuel Collector. K. Pump isolator valve.Be sure to use clean SAE J967 Calibration oilwhen tests are made. Dirty test oil will damagecomponents of fuel injection nozzles. The tem-perature of the test oil must be 18 to 24°C (65 to75°F) for good test results.Order calibration oil by part number, in the quan-tities needed, according to the information thatfollows:6V6068 Calibration Fluid. 18.9 liter (5 U.S. gal.)6V6067 Calibration Fluid. 208.2 liter (55 U.S.gal.)The 8N7001 Fuel Injection Nozzle can not bedisassembled for cleaning or adjustment. Do the tests4-6
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